Machine for cutting paving.



G. PERKINS.

MACHINE FOR CUTTING PAVING.

nruouxon mum snr'r.2e,191a.

Patgnted Mar. 17, 1914.

WITNES Es cure a sprocket w eel c. ,A cutter frame UNITED STATES PATENTfoFFIoE.

GREGORY PERKINS, OF LOS ANGELEQICALITOBNIA.

MACHINE ron comno ravmo.

To all whom it may concern:

Be it known that I, GREGORY PERKINS, a

citizen of the United States, and a resident of Los Angeles, in thecounty of Los An- 5 geles and State of California, have; lnvented anImprovement in Machines for Cutting Paving, of which the following is aspecification. v

-My present invention relates to a machine for cutting asphalt and.other paving through the use of a p0w er driven clrcular saw, my objectbeing to .lp'rovide a machine including means by whic 1 to support a-Cl!- cular saw in such manner that it may be adjusted toward and awayfrom the'ground and held in selected position for cutting the pavin orother material to a deslred depth. In t 1e accompanying drawing whichlllus trates my invention, Figure-1, is aside eleva'tio'n. Fig. 2, is aplan view, and F 1g. 3,

is arear elevation of the upper portion of the adjusting segment and thegear for actuating and controlling the same.

Referring now to these figures, the frame A of my mproved machine issupported upon forward and rear wheels a in the form of rollers and isguided by means ofre'arwardly and upwardly inclined si'cle handle framesB, at the upper ends of which are laterally inwardly projecting-handles6, these handle frames being braced by crossed connecting braces B asshown in Fig. 2;

Upon the forward portion of the frame A is mounted a motor or otherprimemover C, u on the drivm shaft 0 of which is se- D has its forwardportion a! journaled also on the shaft c of the motor, forming a fulcrumupon which the rear portion of the frame D'may be raised and lowered,said frame supporting at its rear lower portion the shaft e of a cutterin the formof a C11- -cular saw E and upon which shaft is also secured asprocket wheel e.

per portion of the frame D anintermediate shaft F upon cured large andsmall f respectively,

The rear upalso supports which are sesprocke't wheels f and the formerof which is connected to the sprocket c of the'driving shaft 0 by meansof a chain F, and'the latter of which is connected to the sprocket wheele of the cutter shaft by means of a similarchain F 4 The rear upperportion of the cutter frame D is provided with an upwardly andrearwardly projectingextension frame D of ends of the standards G andmoved and guided across the rack face of Specification of Letters Pawn.t t M 1914. Application filed September 28, 1913. Serial which anadjusting segmental', the outer surface of which is provided with arack,

and the inner surface of which is transverse adjusting shaft H, thisshaft be-' ing provided with a gear wheel H between the standards G andin engagement with the outer rack face of the segment ll, the relativeengagement of gear H and the segment being maintained by means of sideplates g projecting from the inner upper having in wardly projectingpins engaging the grooved sides of the segment, the said plates g havingpointers g cooperating with the calibrated- .as particularly shown inFig. 1, forms a part.

projecting upright from the i inner calibrated edge of the segmentalrack '(l whereby the adjustmentfof the cutter be properly calculated andread.

frame ma y At one end, shaft H is provided with an crank it and isarranged to be immovably clamped at its opposite end by means of aclamping bearings g which is in the form, of a split sleeves Thus theframe the-surface of the ground by means of the handles 6, and

when moved to the properjposition, the mo prime mover is started for.

tor C or other the purpose of transmitting.motion to the saw cutter Ethrough the connections before mentioned including the sprocket chains Fand F It is then the adjusting shaft H by loosening the clamping screw gand the crank it may be grasped and rotated in order tocause similarmovement of the gear H which engages the segment .01" andTrthu's lowersthe extension frame D and t e-cutiter E into engagement with the surfaceof th e ground or another object beneath the sup' porting frame A. Inthis we thedepth .ofcnt may be readilycontrol ed "and the cutter framelocked in tightening. the clamping rigidly hold the adjusting shaftH'agamst movement.

I claim 1. A machine of the character described screw g controlling oneof the,

A may be readily frame D so as to lower the saw cntter adjustedvposition by screw 9 so as to simply neces- 1 sary to relieve theclamping pressure upon;

the forward portion of comprising a roller supported frame, a motor andthe like mounted upon the forward portion of the machine and having alaterally projected driving shaft, a cutter frame which is fulcrumedupon the driving shaft, a cutter shaft supv ported in the lower rearportion of the outfulcrum at ter frame,,a circular saw secured upon thecutter shaft, connections between the cutter shaft and the 'said drivingshaft and including an intermediate shaft journale'd through the upperrear portion of the cutter frame, handles for moving and guiding themain frame, an extension frame projecting from the upper rear portion ofthe cutter frame and provided with a segmental rack, and means engagingthe said rack for adjusting the main frame and its saw toward and awayfrom the surface of the ground. a

2. In a machine of the character described the combination of avertically adjilstable cutter frame having a supporting its forward endand a rear circul'ar cutter, and provided with a segmental an adjustingshaft, standards having shaft and in mesh with the segmental rack,

all for the purpose described.

i 3. In a. machine of the character destandards having tw -w scribed,the combination of a-verticall ad- 7 justable cutter frame having agroove segmental rack, a circular saw carried by the cutter, frame, a'transverse adjusting shaft having a gear-in engagement with thesegmental rack and ends for the adjusting shaft and one of provided witha handle,

earin'gs at their upper which bearings is inthe form of a split sleeve,guide plates-carried by the said bear .ings and provided with membersengaging the grooves of the rack whereby to hold the rack and gear inengagement, and a clamping screw for clamping the portions of'thessplitsleeve whereby to lock the adjusting shaft and cutter frame in desiredadjustment. I i I 4. In a 'machine of the character described, thecombination .of a vertically adjustable cutter'frame having a supportingfulcrum at one end and a circular cutter at its opposite end andprovided with an extension located substantially above the cuting shaftprovided with a gear in engagement with the rack and having. meanswhereby it may be rotated, and a clamp engaging the said adjustingshaftin order to lock. the same and the cutter frame in adjustedposition, all for the purpose de GREGORY PERKINS.

scribed.

Witnesses:

PERRY TURPIN, GEo. T. SHINNICK.

ter and having a segmental rack, an adjust-.

